#!/usr/bin/env python
# -*- coding:utf-8 -*-
import sys

sys.path.append('..')
from common_utils import CBBCommonUtils


def get_plugin_info():
    plugin_info = {
        "name": "centos_intrusion_guard_004 Stop_NFS_services",
        "plugin_id": "centos_intrusion_guard_004",
        "plugin_type": "Intrusion Guard",
        "info": "Stop NFS service if not necessary.",
        "level": "B",
        "module": "Safety reinforcement",
        "author": "congshz",
        "keyword": "Safety reinforcement",
        "configable": "false"
    }
    return plugin_info


logger = None
cur_user = None
cur_module = None
cur_task = None


def set_plugin_logger(setter, user, module, task, *args, **kwargs):
    global logger, cur_user, cur_module, cur_task
    logger = setter
    cur_user = user
    cur_module = module
    cur_task = task


# 扫描函数
def scan(ip, sys_user, sys_pwd, flag=0):
    des_list = []
    error_count = 0
    # 查看NFS服务是否启动
    cmd = "service nfs status"
    result, output = CBBCommonUtils.cbb_run_cmd(ip, cmd, username=sys_user, passwd=sys_pwd)
    # 检错，每次执行命令都会进行检错，并决定返回退出/继续执行
    if not result or (len(result) == 1 and "Redirecting to" in result[0]):
        # 提取服务状态信息
        not_found = False
        for item in output:
            if "No such file or directory" in item:
                not_found = True
                break
        active = True
        for item in output:
            if "inactive (dead)" in item:
                active = False
                break
        # 判断服务状态
        if not_found:
            des = "nfs service not found and need not be reinforced."
            logger.debug_info(cur_user, cur_module, cur_task+'_Scan', '', des)
            des_list.append(des)
            des_list.append("Scan Complete.")
            logger.debug_info(cur_user, cur_module, cur_task+'_Scan', '', 'Scan Complete.')
            return des_list, error_count
        if active:
            nfs_des = "NFS service is DANGEROUS. now is ACTIVE."
            error_count += 1
            logger.debug_warning(cur_user, cur_module, cur_task+'_Scan', '', nfs_des)
            des_list.append(nfs_des)
        else:
            nfs_des = "NFS service is SAFE. now is INACTIVE (Dead).".format(output[1])
            logger.debug_info(cur_user, cur_module, cur_task+'_Scan', '', nfs_des)
            des_list.append(nfs_des)
    else:
        if "not be found" in result[1]:
            des = "NFS service not found and need not be reinforced."
            logger.debug_warning(cur_user, cur_module, cur_task+'_Scan', '', des)
            des_list.append(des)
            des_list.append("Scan Complete.")
            logger.debug_info(cur_user, cur_module, cur_task+'_Scan', '', 'Scan Complete.')
            return des_list, error_count
        error_des = "CMD process ERROR. Error info: {}".format(result[0].replace("\n", ""))
        des_list.append(error_des)
        logger.debug_error(cur_user, cur_module, cur_task+'_Scan', '', error_des)
        error_count += 1
        return des_list, error_count
    des_list.append("Scan Complete.")
    logger.debug_info(cur_user, cur_module, cur_task+'_Scan', '', 'Scan Complete.')
    if error_count != 0:
        # 是否加固
        if flag == 1:
            reinforce_des, reinforce_err = reinforce(ip, sys_user, sys_pwd)
            des_list.extend(reinforce_des)
            if reinforce_err == 0:
                error_count = 0
    return des_list, error_count


# 加固函数
def reinforce(ip, sys_user, sys_pwd):
    des_list = []
    error_count = 0
    # 备份标记文件
    cmd = "touch /etc/flag.NFS.`date +%Y-%m-%d`"
    result, output = CBBCommonUtils.cbb_run_cmd(ip, cmd, username=sys_user, passwd=sys_pwd)
    if not result:
        # 检查是否备份成功
        check_cmd = "ls /etc | grep flag.NFS.`date +%Y-%m-%d`"
        check_result, check_output = CBBCommonUtils.cbb_run_cmd(ip, check_cmd, username=sys_user, passwd=sys_pwd)
        if not check_result and len(check_output) != 0:
            backup_check_des = "Backup SUCCEED."
            logger.debug_info(cur_user, cur_module, cur_task+'_Reinforce', '', backup_check_des)
        else:
            error_count += 1
            backup_check_des = "Backup check FAILED."
            logger.debug_error(cur_user, cur_module, cur_task+'_Reinforce', '', backup_check_des)
            des_list.append(backup_check_des)
            return des_list, error_count
    else:
        error_count += 1
        backup_des = "Backup FAILED."
        logger.debug_error(cur_user, cur_module, cur_task+'_Reinforce', '', backup_des)
        des_list.append(backup_des)
        return des_list, error_count
    # 修改服务状态
    safe_cmd = "service nfs stop"
    result, output = CBBCommonUtils.cbb_run_cmd(ip, safe_cmd, username=sys_user, passwd=sys_pwd)
    if not result or "Redirecting to" in result[0]:
        # 检查是否修改成功
        check_re_cmd = "service nfs status"
        result, output = CBBCommonUtils.cbb_run_cmd(ip, check_re_cmd,  username=sys_user, passwd=sys_pwd)
        if not result or "Redirecting to" in result[0]:
            # 提取服务状态信息
            active = True
            for item in output:
                if "inactive (dead)" in item:
                    active = False
                    break
            # 判断服务状态
            if active:
                nfs_des = "NFS service is DANGEROUS. now is ACTIVE."
                error_count += 1
                des_list.append(nfs_des)
                logger.debug_warning(cur_user, cur_module, cur_task+'_Reinforce', '', nfs_des)
                des = "Reinforce FAILED."
                des_list.append(des)
                logger.debug_info(cur_user, cur_module, cur_task+'_Reinforce', '', des)
                # 加固失败，回滚
                rollback_des, rollback_err = rollback(ip, sys_user, sys_pwd)
                des_list.extend(rollback_des)
                return des_list, error_count
            else:
                nfs_des = "NFS service is SAFE. now is INACTIVE (Dead)."
                logger.debug_info(cur_user, cur_module, cur_task+'_Reinforce', '', nfs_des)
                des_list.append(nfs_des)
        else:
            error_count += 1
            re_err = "CMD process ERROR. Error info: {}".format(result[0].replace("\n", ""))
            logger.debug_error(cur_user, cur_module, cur_task+'_Reinforce', '', re_err)
            des_list.append(re_err)
            return des_list, error_count
    else:
        error_count += 1
        des = "Reinforce FAILED."
        des_list.append(des)
        logger.debug_info(cur_user, cur_module, cur_task+'_Reinforce', '', des)
        # 加固失败，回滚
        rollback_des, rollback_err = rollback(ip, sys_user, sys_pwd)
        des_list.extend(rollback_des)
        return des_list, error_count
    des_list.append("Reinforce Complete.")
    logger.debug_info(cur_user, cur_module, cur_task+'_Reinforce', '', "Reinforce Complete.")
    return des_list, error_count


# 回滚函数
def rollback(ip, sys_user, sys_pwd):
    des_list = []
    error_count = 0
    # 查找标志文件
    grep_cmd = "ls /etc/ | grep flag.NFS.*"
    result, output = CBBCommonUtils.cbb_run_cmd(ip, grep_cmd, username=sys_user, passwd=sys_pwd)
    if not result and len(output) != 0:
        logger.debug_info(cur_user, cur_module, cur_task+'_Rollback', '', "Backup file FOUND.")
        target = output[len(output) - 1].replace("\n", "")
    else:
        error_count = -1
        des_list.append("Backup file NOT FOUND.")
        logger.debug_error(cur_user, cur_module, cur_task+'_Rollback', '', "Backup file not found.")
        return des_list, error_count
    # 回滚文件
    rollback_cmd = "service nfs restart"
    result, output = CBBCommonUtils.cbb_run_cmd(ip, rollback_cmd, username=sys_user, passwd=sys_pwd)
    if not result or "Redirecting to" in result[0]:
        logger.debug_info(cur_user, cur_module, cur_task+'_Rollback', '', "Rollback SUCCEED.")
        del_cmd = "rm -rf /etc/" + target
        # 删除对应的备份文件
        result, output = CBBCommonUtils.cbb_run_cmd(ip, del_cmd, username=sys_user, passwd=sys_pwd)
        if not result:
            del_des = "Backup file deleted. Target is {}.".format(target)
            logger.debug_info(cur_user, cur_module, cur_task+'_Rollback', '', del_des)
        else:
            error_count += 1
            del_des = "Backup file delete FAILED."
            des_list.append(del_des)
            logger.debug_error(cur_user, cur_module, cur_task+'_Rollback', '', del_des)
            return des_list, error_count
    else:
        error_count += 1
        des = "Rollback FAILED, please retry."
        des_list.append(des)
        logger.debug_error(cur_user, cur_module, cur_task+'_Rollback', '', des)
        return des_list, error_count
    des_list.append("Rollback Complete.")
    logger.debug_info(cur_user, cur_module, cur_task+'_Rollback', '', "Rollback Complete.")
    return des_list, error_count


def check(ip, *args, **kwargs):
    sys_user = kwargs.get("system_user")
    sys_pwd = kwargs.get("system_pwd")
    comm = kwargs.get("command")
    try:
        des_list = []
        des_start = "centos_intrusion_guard_004 Start."
        logger.debug_info(cur_user, cur_module, cur_task+'_Check', '', des_start)
        if comm == 1:
            des_scan, error_scan = scan(ip, sys_user, sys_pwd, flag=0)
            des_list.extend(des_scan)
            step_error = int(error_scan)
        elif comm == 2:
            des_reinforce, error_reinforce = scan(ip, sys_user, sys_pwd, flag=1)
            des_list.extend(des_reinforce)
            step_error = int(error_reinforce)
        elif comm == 3:
            des_rollback, error_rollback = rollback(ip, sys_user, sys_pwd)
            des_list.extend(des_rollback)
            step_error = int(error_rollback)
        else:
            return {"code": 3, "count": 0, "des": ['command must be 1/2/3']}
        des_end = "centos_intrusion_guard_004 Complete."
        logger.debug_info(cur_user, cur_module, cur_task+'_Check', '', des_end)
        if step_error == 0:
            code = 0
        elif step_error <= -1:
            code = 2
        else:
            code = 1
        return {"code": code, "count": step_error, "des": des_list}
    except Exception as er:
        code = 1
        des = ["ERROR:", str(er)]
        logger.debug_error(cur_user, cur_module, cur_task+'_Check', '', des)
        return {"code": code, "count": 0, "des": des}

# check(ip="127.0.0.1", system_user="root", system_pwd="1qaz!QAZ", command=0, flag=0)
# check(ip="100.2.91.150", system_user="root", system_pwd="admin", command=0, flag=0)
